Dental implant

Abstract

A dental implant for anchoring in a jawbone to support an abutment for mounting a dental prosthesis is described. The dental implant comprises a collar portion located at an open proximal distal end, a mid portion integrally connected to the collar portion and a base hollow portion integrally connected to a mid portion and located at an open distal end of said implant. The collar portion has an axial opening that extends into a blind hole proceeding from the proximal end into the interior of the implant and is configured to secure the abutment to the dental implant. The mid portion includes external helical treads turning around an external wall of the mid portion. The base hollow portion comprises a wall defining an internal storage volume for an osseous tissue of the jawbone. The base hollow portion comprises a plurality of openings arranged in the wall and entering the internal storage volume. The base hollow portion is unthreaded and tapered with contraction towards the distal end.

1 . A dental implant for anchoring in a jawbone to support an abutment for mounting a dental prosthesis, comprising:
 a collar portion located at an open proximal distal end having an axial opening that extends into a blind hole proceeding from the proximal end into the interior of the implant and configured to secure the abutment to the dental implant;   a mid portion integrally connected to the collar portion and including external helical treads turning around an external wall of the mid portion, and   a base hollow portion integrally connected to a mid portion and located at an open distal end of said implant and comprising a wall defining an internal storage volume for an osseous tissue of said jawbone, said base hollow portion comprising a plurality of openings arranged in the wall and entering said internal storage volume; said base hollow portion being unthreaded and tapered with contraction towards the distal end.   
     
     
         2 . The dental implant of  claim 1 , wherein said collar portion has a substantially cylindrical unthreaded shape. 
     
     
         3 . The dental implant of  claim 1 , wherein said blind hole proceeding from the proximal end into the interior of the implant includes an internally-extending chamfered zone located near the proximal end, and is followed by a wrench-engaging zone adapted for engaging with a tool that screws the implant into the jawbone; said wrench-engaging zone is followed by an abutment post receiving chamber zone, that in turn is followed by an internally-threaded zone having a threaded surface configured to receive a bolt used to secure the abutment to the dental implant. 
     
     
         4 . The dental implant of  claim 3 , wherein a part of the wrench-engaging zone, the entire post receiving chamber zone and the internally-threaded zone are resided within the mid portion. 
     
     
         5 . The dental implant of  claim 1 , wherein said mid portion includes at least one flute having a self-tapping cutting edge. 
     
     
         6 . The dental implant of  claim 5 , wherein the flute extends at least half of the length of the mid portion. 
     
     
         7 . The dental implant of  claim 1 , wherein the mid portion is tapered with contraction towards the base portion. 
     
     
         8 . The dental implant of  claim 7 , wherein the contraction of said mid portion is axially symmetric with a tapering angle from about 2° to about 10°. 
     
     
         9 . The dental implant of  claim 7 , wherein the contraction of said mid portion starts from the end of the collar portion. 
     
     
         10 . The dental implant of  claim 7 , wherein the contraction of said mid portion is asymmetric with respect to a longitudinal axis of the dental implant. 
     
     
         11 . The dental implant of  claim 1 , wherein the openings have a circular shape. 
     
     
         12 . The dental implant of  claim 11 , wherein the openings are arranged in at least one row. 
     
     
         13 . The dental implant of  claim 11 , wherein the openings are arranged in a plurality of rows distributed and equally spaced along the length of the hollow base portion. 
     
     
         14 . The dental implant of  claim 11 , wherein the circular openings in each row are equally spaced. 
     
     
         15 . The dental implant of  claim 1 , wherein the area of the openings in the wall of the base portion ( 13 ) should not exceed 60% of the total area of the wall. 
     
     
         16 . The dental implant of  claim 1 , wherein the area of the openings in the wall of the base portion is in the range of about 50% to 60% of the total area of the wall. 
     
     
         17 . The dental implant of  claim 1 , wherein the openings are slot openings. 
     
     
         18 . The dental implant of  claim 17 , wherein the slot openings extend along at least a part of the length of the base portion between the mid portion and the distal end of the base portion.